@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@300;400;500;600;700&family=Inter:wght@300;400;600;700&display=swap');

/* Global Variables */
:root {
    /* Default Dark Mode (Cybersecurity Theme) */
    --primary-color: #0f0;
    /* Neon Green */
    --secondary-color: #00ff41;
    /* Slightly different green */
    --background-color: #050505;
    /* Deep Black */
    --text-color: #e0e0e0;
    --heading-color: #ffffff;
    --light-gray: #111;
    /* Dark gray for cards/sections */
    --border-color: #333;
    --accent-glow: 0 0 10px rgba(0, 255, 0, 0.5);

    --transition-speed: 0.3s;
    --font-heading: 'Fira Code', monospace;
    /* Monospace for headers */
    --font-body: 'Inter', sans-serif;
}

[data-theme="light"] {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --background-color: #ffffff;
    --text-color: #1f2937;
    --heading-color: #111827;
    --light-gray: #f3f4f6;
    --border-color: #e5e7eb;
    --accent-glow: none;
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-body);
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color var(--transition-speed), color var(--transition-speed);
    overflow-x: hidden;
    /* Prevent horizontal scroll from animation */
}

/* Canvas for Background Animation */
#bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    /* Behind everything */
    opacity: 0.3;
    /* Subtle effect */
    pointer-events: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    color: var(--heading-color);
    margin-bottom: 1rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

/* Cyber Glitch Effect on Hover for Headings (Optional) */
h1:hover,
h2:hover {
    text-shadow: var(--accent-glow);
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: all var(--transition-speed);
}

a:hover {
    color: var(--secondary-color);
    text-shadow: 0 0 5px var(--primary-color);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button {
    cursor: pointer;
    font-family: inherit;
    border: none;
    background: none;
}

/* Container */
.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    position: relative;
    /* Ensure content is above canvas */
    z-index: 1;
}

/* Header */
.site-header {
    background-color: rgba(5, 5, 5, 0.9);
    /* Semi-transparent */
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.main-nav ul {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.main-nav a {
    color: var(--text-color);
    font-weight: 500;
    font-family: var(--font-heading);
    font-size: 0.9rem;
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--primary-color);
    text-shadow: var(--accent-glow);
}

#theme-toggle {
    font-size: 1.2rem;
    padding: 0.5rem;
    border-radius: 50%;
    transition: background-color var(--transition-speed);
    color: var(--text-color);
}

#theme-toggle:hover {
    background-color: var(--light-gray);
    color: var(--primary-color);
}

.mobile-menu-toggle {
    display: none;
    font-size: 1.5rem;
    color: var(--primary-color);
}

/* Hero Section */
.hero {
    padding: 6rem 0;
}

.hero-content {
    max-width: 800px;
}

.hero h1 {
    font-size: 3.5rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.hero .highlight {
    color: var(--primary-color);
    text-shadow: var(--accent-glow);
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-color);
    margin-bottom: 1rem;
    opacity: 0.9;
    font-family: var(--font-heading);
}

.hero-description {
    font-size: 1.125rem;
    margin-bottom: 2.5rem;
    color: var(--text-color);
    opacity: 0.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    /* Sharper corners for cyber look */
    font-weight: 600;
    font-family: var(--font-heading);
    transition: all var(--transition-speed);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.9rem;
}

.btn-primary {
    background-color: transparent;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
    box-shadow: 0 0 5px var(--primary-color);
}

.btn-primary:hover {
    background-color: var(--primary-color);
    color: #000;
    transform: translateY(-2px);
    box-shadow: 0 0 20px var(--primary-color);
}

.btn-secondary {
    background-color: var(--light-gray);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--border-color);
    border-color: var(--text-color);
    transform: translateY(-2px);
}

.btn-outline {
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-outline:hover {
    background-color: var(--primary-color);
    color: #000;
    box-shadow: 0 0 10px var(--primary-color);
}


/* Sections Common */
section {
    padding: 4rem 0;
}

.section-title {
    font-size: 2rem;
    margin-bottom: 3rem;
    text-align: center;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background-color: var(--primary-color);
    margin: 1rem auto 0;
    border-radius: 2px;
}

/* Featured Projects */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.project-card {
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    overflow: hidden;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.project-image-placeholder {
    width: 100%;
    height: 200px;
    background-color: var(--light-gray);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-color);
    font-weight: bold;
}

.project-info {
    padding: 1.5rem;
}

.project-info h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.project-info p {
    font-size: 0.95rem;
    margin-bottom: 1rem;
    opacity: 0.8;
}

.project-link {
    font-weight: 600;
}

/* Latest Posts */
.post-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    max-width: 800px;
    margin: 0 auto 3rem;
}

.post-item {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 2rem;
}

.post-item:last-child {
    border-bottom: none;
}

.post-date {
    font-size: 0.875rem;
    color: var(--text-color);
    opacity: 0.6;
    display: block;
    margin-bottom: 0.5rem;
}

.post-item h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.post-item h3 a {
    color: var(--heading-color);
}

.post-item h3 a:hover {
    color: var(--primary-color);
}

/* Footer */
.site-footer {
    background-color: var(--light-gray);
    padding: 3rem 0;
    text-align: center;
    margin-top: 4rem;
}

.social-links {
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.social-links a {
    color: var(--text-color);
    font-size: 1rem;
    font-weight: 600;
}

.site-footer p {
    opacity: 0.7;
    font-size: 0.9rem;
}

.center-btn {
    text-align: center;
}

/* Responsive */
@media (max-width: 768px) {
    .site-header .container {
        flex-wrap: wrap;
    }

    .mobile-menu-toggle {
        display: block;
    }

    .main-nav {
        display: none;
        width: 100%;
        margin-top: 1rem;
    }

    .main-nav.active {
        display: block;
    }

    .main-nav ul {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }

    .hero h1 {
        font-size: 2.25rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        text-align: center;
    }
}